from flask import abort, jsonify
from flask import current_app
from flask import g
from flask import render_template
from flask import request

from info import constants, db
from info.models import News, Comment, CommentLike
from info.utils.common import user_login_data
from info.utils.response_code import RET
from . import news_blu


@news_blu.route('/comment_like',methods=['POST'])
@user_login_data
def set_comment_like():
    '''评论点赞'''
    user =g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")
    comment_id = request.json.get("comment_id")
    news_id = request.json.get("news_id")
    action = request.json.get("action")
    if not all([comment_id, news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action not in ("add", "remove"):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    # 查询拼论数据
    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="查询数据失败")
    if not comment:
        return jsonify(errno=RET.NODATA, errmsg="评论数据不存在")

    if action == 'add':
        comment_like = CommentLike.query.filter_by(comment_id=comment_id,user_id=user.id).first()
        if not comment_like:
            comment_like = CommentLike()
            comment_like.comment_id = comment_id
            comment_like.user_id = user.id
            db.session.add(comment_like)
            comment.like_count += 1
    else:
#     删除点赞数据
        comment_like = CommentLike.query.filter_by(user_id=user.id,comment_id =comment_id).first()
        if comment_like:
            db.session.delete(comment_like)
            # 减小点赞条数
            comment.like_count -= 1
    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="操作失败")
    return jsonify(errno=RET.OK, errmsg="操作成功")



@news_blu.route('/news_comment',methods=['POST'])
@user_login_data
def add_news_comment():
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")
    # 获取参数
    data_dict = request.json
    news_id = data_dict.get("news_id")
    comment_str = data_dict.get("comment")
    parent_id = data_dict.get("parent_id")
    if not all([news_id, comment_str]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数不足")
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="查询数据失败")
    if not news:
        return jsonify(errno=RET.NODATA, errmsg="该新闻不存在")
    # 初始化模型,保存数据
    comment =Comment()
    comment.user_id = user.id
    comment.news_id = news_id
    comment.content = comment_str
    if parent_id:
        comment.parent_id= parent_id
#     保存到数据库
    # 保存到数据库
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="保存评论数据失败")

    # 返回响应
    return jsonify(errno=RET.OK, errmsg="评论成功", data=comment.to_dict())


@news_blu.route('/news_collect',methods=['POST'])
@user_login_data
def news_collect():
    news_id = request.json.get('news_id')
    action = request.json.get('action')
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")
    if not news_id:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    if action not in ("collect", "cancel_collect"):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="查询数据失败")
    if not news:
        return jsonify(errno=RET.NODATA, errmsg="新闻数据不存在")

    if action == "collect":
        user.collection_news.append(news)
    else:
        user.collection_news.remove(news)

    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="保存失败")
    return jsonify(errno=RET.OK, errmsg="操作成功")

@news_blu.route('/<int:news_id>')
@user_login_data
def news_detail(news_id):
# 1.查询用户登录状态
    user = g.user
# 2.实现右面的点击排行
    news_list = None
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)
    click_news_list = []
    for news in news_list if news_list else []:
        click_news_list.append(news.to_basic_dict())
# 3.实现详情页的展示
    news =None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        abort(404)
    if not news:
        abort(404)
    news.clicks +=1
# 4.实现请求是判断是否收藏
    is_collected = False
    if user:
        if news in user.collection_news:
            is_collected = True

# 5.显示所有评论
    comments = []
    try:
        comments = Comment.query.filter(Comment.news_id==news_id).order_by(Comment.create_time.desc()).all()

    except Exception as e:
        current_app.logger.error(e)

# 显示拼论点赞
    comment_like_ids = []
    if user:
        try:
            comment_ids = [comment.id for comment in comments]
            if len(comment_ids) > 0:
    #             取到到当前用户在新闻的所有拼论点赞的记录
                comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids),CommentLike.user_id == user.id).all()
                # 取出记录中所有的评论id
                comment_like_ids = [comment_like.comment_id for comment_like in comment_likes]
        except Exception as e:
            current_app.logger.error(e)

    comment_list = []
    for item in comments if comments else []:
        comment_dict = item.to_dict()
        comment_dict['is_like'] = False
        if user and item.id in comment_like_ids:
            comment_dict['is_like'] = True
        comment_list.append(comment_dict)



    data = {
        'user_info':user.to_dict() if user else None,
        'click_news_list':click_news_list,
        'news':news.to_dict(),
        'is_collected':is_collected,
        'comments':comment_list
    }
    return render_template('news/detail.html',data=data)